Center of Mass Roller-and-Ramp Demonstrator, 17" Microscopy_Microscopy Equipment &Supplies allowing this tangent galvanometer to

allowing this tangent galvanometer to convert deflection angle into an absolute current reading

exposing the rotating coil and field magnet for direct observation as students supply 4-9V to drive the rotation

designed to receive real images projected by lenses and concave mirrors during focal-length and magnification experiments on the optical bench

Double-parallel plastic pulley with two 50mm wheels in a steel frame and end hooks

Center of Mass Roller-and-Ramp Demonstrator, 17" Microscopy_Microscopy Equipment &Supplies allowing this tangent galvanometer toClear coated wooden A ramp at 17 inches long paired with a double ended cone roller that appears to travel uphill while its center of mass actually descends along the diverging rails.